<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>grid-area</title>
    <style>
    .main {
        background-color: royalblue;
        display: grid;
        grid-template-columns: repeat(10, 1fr);
        grid-template-rows: 100px 150px 200px;
        gap: 10px;
    }
    div div:first-child {
        background-color: salmon;
    }
    div div:nth-child(2) {
        background-color: red;
    }
    </style>
</head>
<body>
    <div class="main">
        <div></div>
        <div></div>
    </div>
</body>
</html>